The parameter meanings: /f = Turns off blue background /T NTN_InstallMode = Install, Remove, Update, Configure or Bind This option is identical to the GUI interface /T NTN_Origination = Install (= NCPA when setup issued by NCPA.CPL) /T NTN_Infname = Name of the INF file name /T NTN_SRCPATH = Path to the distribution files /T NTN_Infoption = Name of the option. To figure out which option has to be installed, open the INF file and search for the section \[Options\]. You should find the name of the option to setup.